<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Float And Clear</title>
</head>

<body>
    <div style="width: 120px;height: 30px;background: red;float: left;">Div-1</div>
    <div style="width: 320px;height: 30px;background: blue;float: left;clear: left;">Div-2</div>
    <!-- <div style="width: 50px;height: 70px;background: yellow;">Div-3</div>
    <div style="width: 70px;height: 40px;background: green;float: left;">Div-4</div> -->
</body>

</html>